Lamp



FIG. 1 is a three-quarter top plan view of my new design relating to a lamp;

FIG. 2 is a three-quarter bottom plan view of my new design;

FIG. 3 is a right side view of my new design;

FIG. 4 is a left side view of my new design;

FIG. 5 is a front view of my new design; and,

FIG. 6 is a rear view of my new design. 

The ornamental design for a lamp, as shown in the accompanying drawings. 